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How do you increase the performance of %LIKE operator?, What is a standby
database? Difference between Physical and logical standby databases, What is
Cache Fusion Technology?, What is simple replication and advance
replication?.............
UNION: The UNION operator is used to combine the result-set of two or more
SELECT statements Tables of both the select statement must have the same number
of columns with similar data types. It eliminates duplicates..........
Explain sub-queries in brief, What are the different operators used in building
sub queries?, What are the guidelines for using SUB-QUERIES?, What is
correlated sub-query?.............
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